Two powerpoints for teaching and revising acids bases and buffers. Worked examples of calculations and includes some exam questions. Spec points and exam questions are from AQA but content related to all exam boards.
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Aimed at foundation GCSE students. The worksheet is designed with the questions increasing in difficulty as you go up the rows.
Ask the students to complete a many questions on the answer grid as they can individually using their KS3 knowledge. Then share ideas with a partner. Then give the pairs the research poster to check current answers and complete the rest of the questions. Then whole class discussion of answers.
Alternatively could be used as a revision activity.
A structured KS5 lesson including starter activity, AfL work tasks and main work task all with answers on Bronsted Lowry Acids and Bases
By the end of this lesson KS5 students should be able to:
To describe the difference between a BrØnsted Lowry acid and base
To identify conjugate acid-base pairs
To explain the difference between monobasic, dibasic and tribasic acids
To understand the role of H+ in the reactions of acids with metals and bases (including carbonates, metal oxides and alkalis), using ionic equations
Declaimer: Please refrain from purchasing this popular resource for an interview lesson or a formal observation. This is because planning your own lessons, including using your own lesson PowerPoints, is a fundamental skill of a qualified/unqualified teacher that will be assessed during the scenarios outlined above
Broadsheet made for the AQA scheme but will work for OCR. Revision broadsheet that covers: Acids, bases, strong/weak acids, ions, neutralisation, equations, soluble salts, insoluble salts.
Complete lessons and workbook
Content
Describe the use of litmus, phenolphthalein and methyl orange
to distinguish between acidic & alkaline solutions
Understand how to use the pH scale, from 0–14, to classify
solutions as strongly acidic (0-3), weakly acidic (4-6), neutral (7),
weakly alkaline (8-10) and strongly alkaline (11-14)
Describe the use of Universal Indicator to measure the
approximate pH value of an aqueous solution
Know that acids in aqueous solution are a source of hydrogen
ions and alkalis in an aqueous solution are sources of hydroxide
ions
Know that metal oxides, metal hydroxides and ammonia can be
classified as bases and that alkalis are bases that are soluble in
water
Know that bases can neutralise acids
Understand acids and bases in terms of proton transfer and that
an acid is a proton donor and a base is a proton acceptor
Understand how to use acid-base character of oxides to classify
elements as metals or non-metals
Describe the combustion of elements in oxygen, including
magnesium, hydrogen and sulfur
Describe the reactions of hydrochloric, sulfuric and nitric acids
with:
metals (but not with nitric acid)
bases
metal carbonates
Describe an experiment to prepare a pure, dry sample of a
soluble salt starting from an insoluble reactant
Describe an experiment to prepare a pure, dry sample of a
soluble salt starting from an acid and an alkali
Describe an experiment to prepare a pure, dry sample of an
insoluble salt starting from two soluble reactants
A lesson where students will investigate the meanings of Arenhuis and Lowry-Bronstead theories.
Students will also calculate the concentration of acids using exam style questions.
GCSE Chemistry crossword on Acids and Bases. Also suitable for combined science. Could be used as a revision tool. Word list is in a box at the bottom of the sheet and can be sliced off to aid differentiation ie only providing word list to selected students. Solutions provided.
This complete year 12 resource on acid-base titrations includes the practical procedure and calculations for titrations as well as details of evaluating experiments. It features a 28 slide interactive PowerPoint that illustrates the concepts in a lively, visual and systematic way. The resource includes a starter, learning checks, clearly explained examples of calculations, a practical activity with evaluation and a plenary. A 20 page worksheet includes a variety of structured and unstructured calculations and answers to all exercises. Ideal for the classroom or blended learning, this resource could be used to present the topic, or for revision, extension or consolidation.
This lesson is part of a series covering the OCR AS Chemistry specification and relates to the following sections:
Module 2 – Foundations in chemistry
Part 1 – Atoms and reactions
2.1.4 – Acids (part)
Content covered:
• Titration and uses
• Standard solution
• Glassware and procedure for titration with detailed hints for technique
• Reading burette
• Recording titration results and calculating the mean
• Titration calculations
• Examples of structured and unstructured calculations
• Revision of calculations involving masses and volumes
• Practical titration activity
• Evaluation of titration experiment
• Uncertainties and calculating % uncertainties
• Procedural errors
Duration: 2 lessons
Please review!
Links
Previous topic: Topic 11 – Acids and bases (free resource)
https://www.tes.com/teaching-resource/acids-and-bases-ocr-as-chemistry-12747201
Next topic: Topic 13 – Redox
https://www.tes.com/teaching-resource/redox-ocr-as-chemistry-12409890
Related topics
Topic 8 − Moles and concentration of solutions
https://www.tes.com/teaching-resource/moles-and-concentration-of-solutions-ocr-as-chemistry-12391026
Topic 9 – Moles and reactions
https://www.tes.com/teaching-resource/moles-and-reactions-ocr-as-chemistry-12404411
Bundle − Moles, masses, concentrations, gas volumes and reactions
https://www.tes.com/teaching-resource/moles-masses-concentrations-gas-volumes-and-reactions-12404451
This packet covers the following learning objectives through simplified one-page readings, virtual labs, guided inquiry, researching secondary database etc. Includes a formative after every lesson and guidelines for a project based summative.
Define Arhennius acid and base.
Identify acid and base from their formula.
Describe characteristic properties of acids in their reaction with metals, metal oxides and hydroxides and metal carbonates
Describe the characteristic properties of bases in their reaction with acids and ammonium salts.
Understand the pH scale as a figure expressing the acidity or alkalinity of a solution.
Apply knowledge of indicators (Litmus, Methyl Orange and Universal Indicator) to determine pH of solutions.
Differentiate between strong and weak and concentrate and dilute acids and alkali.
Discuss acid rain and ocean acidification.
10 Full Lesson Bundle + BONUS lesson on Acids, bases & buffers. This bundle covers the OCR A Level Chemistry specification. Please review the learning objectives below.
Lesson 1: Bronsted-Lowry Acid and Bases
To describe the difference between a BrØnsted Lowry acid and base
To identify conjugate acid-base pairs
To explain the difference between monobasic, dibasic and tribasic acids
To understand the role of H+ in the reactions of acids with metals and bases (including carbonates, metal oxides and alkalis), using ionic equations
Lesson 2: Strong Acids & The pH Scale
To calculate the pH of a strong acid
To convert between pH and [H+(aq)]
To apply the relationship between pH and [H+(aq)] to work out pH changes after dilution
**Lesson 3 - The Acid Dissociation Constant **
To understand the acid dissociation constant, Ka, as the extent of acid dissociation
To know the relationship between Ka and pKa
To convert between Ka and pKa
Lesson 4- pH of weak acids
To recall the expression of pH for weak monobasic acids
To calculate the pH of weak monobasic acids using approximations
To analyse the limitations of using approximations to Ka related calculations for ‘stronger’ weak acids
Lesson 5 - The ionic product of water
To recall the expression for the ionic product of water, Kw (ionisation of water)
To calculate the pH of strong bases using Kw
To apply the principles for Kc, Kp to Kw
Lesson 6-9 - Buffer Solutions (3 part lesson)
Part 1: Explaining How Buffer Solutions Work
To know a buffer solution is a system that minimises pH changes on addition of small amounts of an acid or base
To describe how a buffer solution is formed using weak acids, salts and strong alkalis
To explain the role of the conjugate acid-base pair in an acid buffer solution such as how the blood pH is controlled by the carbonic acid–hydrogencarbonate buffer system
Part 2: Buffer Solution Calculations (Part 1)
To calculate the pH of a buffer solution containing a weak acid and the salt of a weak acid by using the Ka expression and pH equation
To calculate equilibrium concentrations, moles or mass of the components of a weak acid-salt of a weak acid buffer solution
Part 3: Buffer Solution Calculations (Part 2)
To calculate the pH of a weak acid-strong alkali buffer solution
To calculate equilibrium concentrations, moles or mass of the components of a weak acid- strong alkali buffer solution
BONUS Lesson 9 : Revision on Buffer Solutions
To review how to calculate the pH of a buffer solution containing a weak acid and a strong alkali
To review how to calculate the pH of a buffer solution containing a weak acid and the salt of the weak acid
Lesson 10- Neutralisation & Titration Curves
To interpret titration curves of strong and weak acids and strong and weak bases
To construct titration curve diagrams of strong and weak acids and strong and weak bases
**Lesson 11- pH indicators & Titration Curves **
To explain indicator colour changes in terms of equilibrium shift between the HA and A- forms of the indicator
To explain the choice of suitable indicators given the pH range of the indicator
To describe an experiment for creating a titration curve
Declaimer: Please refrain from purchasing this popular resource for an interview lesson or a formal observation. This is because planning your own lessons including using your own lesson PowerPoints is a fundamental skill of a qualified/unqualified teacher that will be reviewed during these scenarios outlined above
Bundle with 4 activities on Acids and Alkalis
• Acids and Bases - Card Game
(top value trumps other cards)
• Acids and Bases - Loop Game
• Acids and Bases - Tarsia
• Acids and Bases - Card Sort
(sort cards into acids and alkalis, or match cards along pH scale, or match cards with pH values)
A double-sided worksheet and answer sheet which is written in American English and aimed at 16+ year old chemistry students studying acids, bases and their reactions.
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